Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - deploy.sh: Silence cleanup output

    Cleanup sequence might print some warnings/errors that are misleading
    for new users, so let's silence them.
    While at it, remove unused `cleanup` function stub.

    Change-Id: Ic4225f7d4b701cd15d96e1bfc5eecfe2c4291eb6
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 84f131b32ac510097c3aac321fb1ca67bafc8941)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index b22219a..5e2c2b7 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit b22219a381a5124febbb0b96ddf1d0828e9cf3ed
+Subproject commit 5e2c2b7842214dffa69c3fd11c87d26f3109dc85